EP1386652B1 - Dispositif pour nettoyer des filtres à manche et un conteneur avec ce dispositif - Google Patents

Dispositif pour nettoyer des filtres à manche et un conteneur avec ce dispositif Download PDF

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Publication number
EP1386652B1
EP1386652B1 EP03014376A EP03014376A EP1386652B1 EP 1386652 B1 EP1386652 B1 EP 1386652B1 EP 03014376 A EP03014376 A EP 03014376A EP 03014376 A EP03014376 A EP 03014376A EP 1386652 B1 EP1386652 B1 EP 1386652B1
Authority
EP
European Patent Office
Prior art keywords
cleaning
bag
bag filter
filter
filters
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03014376A
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German (de)
English (en)
Other versions
EP1386652A1 (fr
Inventor
Dieter Wallstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wallstein Ingenieur-Gesellschaft mbH
Original Assignee
Wallstein Ingenieur-Gesellschaft mbH
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Filing date
Publication date
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Publication of EP1386652A1 publication Critical patent/EP1386652A1/fr
Application granted granted Critical
Publication of EP1386652B1 publication Critical patent/EP1386652B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D41/00—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4263—Means for active heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/79—Regeneration of the filtering material or filter elements inside the filter by liquid process

Definitions

  • the invention relates to a device for external wet cleaning of bag filters according to the features of the protection claim 1 and a transport container with such a device.
  • bag filters are used. These are flown in from the outside by flue gas, wherein the particles to be deposited settle on the outer circumference of the bag filter. The purified gas is withdrawn through the inside of the bag filters. After a certain period of time, the bag filters must be cleaned, as the accumulation of particles causes the pressure loss caused by the bag filters to become too high and the downstream fans or induced draft no longer suffice to overcome the increased pressure difference.
  • the bag filters can then either be replaced and completely replaced by new bag filters or subjected to a cleaning process.
  • Known cleaning methods provide dry cleaning, for example by means of a vibrator, a rolling device or by means of air pressure shocks.
  • wet cleaning the bag filters are usually removed and washed in long troughs and then dried. The washing process can also be done by a high-pressure cleaner or simply with a water hose.
  • Wet cleaning has the advantage that a higher degree of cleaning can be achieved, with the cleaned bag filters having a permeability of 60-75%.
  • the bag filters In the initial state, ie in the new state, the bag filters have a permeability of about 100%.
  • a permeability of about 40% can be achieved.
  • a cleaning system for fabric filter tubes is known in which by wet cleaning the fabric filter hoses are linear and unidirectionally washed from the clean gas side to the raw gas side and dried in one pass by means of hot air.
  • the soiled filter tube is pulled through the annular gap between an internally guided Wasch sometimeskeitszu effetskopf and out at about the same amount outwardly guided annular suction. This wet cleaning is followed by a drying section with supply of hot air and subsequent suction.
  • the invention has for its object to provide a device for wet cleaning of bag filters, with which a complete wetting of the filter fabric is avoided and which simultaneously allows rapid drying.
  • Another object is to show a way to use such a device for wet cleaning as mobile as possible.
  • the main advantage of the device according to the invention is the fact that not all the tissue of the bag filter must be wetted for cleaning, but only its outer surface comes into contact with cleaning liquid.
  • it is provided to pressurize the bag filter as a whole with internal pressure. The wet cleaning takes place exclusively on its outer surface, so that in the DE 100 27 320 A1 described problem of salt crust formation on the inner surface of the bag filter is solved.
  • the blown by the blowing device in the bag filter air has a temperature which is higher than the temperature of the ambient air (protection claim 2).
  • the temperatures may be in the range of about 20 ° C to about 70 ° C (protection claim 3). This makes it possible to dry bag filter immediately after the external wet cleaning to a certain residual moisture content intensive.
  • each bag filter is horizontally mounted in the receptacle on a provided with drain holes bearing that is preferably formed in the longitudinal direction of the bag filter extending rods (protection claim 5). Between the mutually spaced bars the drain holes are sized maximum, so that even larger, removed in the wet cleaning filter cake pieces can be easily removed through the drain holes of the bag filters.
  • a trough-shaped in cross-section configuration of each support contributes to the additional positional orientation of the bag filter, so that they retain their intended position even under the influence of wet cleaning (protection claim 6).
  • the wet cleaning itself is carried out via at least one, relative to the bag filter relatively movably arranged and directed on the outer surface of the cleaning nozzle (protection claim 7).
  • the bag filter to be cleaned and pressurized with internal pressure is oriented during the entire cleaning process within the receptacle, wherein the cleaning nozzle basically performs any relative movements relative to the bag filter.
  • the relative movements can take place both translationally in the direction or transversely to the longitudinal axis of the bag filter as well as rotating about the longitudinal axis. Of course, a combination of translational and rotational movement, possibly with simultaneous oscillation, possible.
  • a cleaning jet emerging from a cleaning jet does not impinge perpendicularly on the outer surface of the bag filter, but at an angle not equal to 90 °.
  • This has the advantage that firmly adhering filter cake are peeled off by the oblique impingement, so to speak, from the outer surface of the bag filter, since the cleaning jet penetrates between the outer surface of the bag filter and the filter cake.
  • the resulting upon impact with the outer surface back pressure of the cleaning jet at oblique incidence is lower, so that it is largely impossible with unchanged dynamic pressures and improved cleaning effect at the same time that cleaning fluid enters the interior of the bag filter.
  • the cleaning nozzle is arranged on a movable in the longitudinal direction of the bag filter cleaning slide.
  • This may of course be a plurality of cleaning nozzles, which are arranged such that a certain peripheral region of the bag filter is cleaned in a complete process in the longitudinal direction. If during each operation, for example, 1/3 of the circumferential area of the bag filter is cleaned over the entire length, it is only necessary to connect two further cleaning operations and to rotate the bag filters at 120 ° about the longitudinal axis.
  • the cleaning nozzles can also be distributed over the entire circumference of the bag filter, as intended by the features of patent claim 9. This is possible, in particular, when the supports in the receptacles are designed as rods extending in the longitudinal direction of the bag filter, so that the cleaning carriage can be moved without obstacles over the entire length of the bag filter.
  • the circumferential distribution of the cleaning nozzles can expediently be in a radial plane. Such a circular arrangement of the cleaning nozzles is the subject of the protection claim 10.
  • the cleaning nozzles may be arranged distributed circumferentially in the longitudinal direction.
  • a plurality of rows of cleaning nozzles connected in series on the cleaning carriage may be provided to process, for example, the outer surface areas from two different angles with cleaning jets, in this way particularly firmly adhering filter cake to be able to solve or in a general way to improve the cleaning effect.
  • the cleaning slide is guided relative to the tube filters on rails.
  • rails These can be advantageously arranged on the side walls of the receptacle (protection claim 11).
  • the side walls of the receptacle may be provided at their upper longitudinal edges with suitable rails.
  • At least two bag filters can be connected to the blowing device at the same time, wherein individual bag filters can be acted upon with internal pressure by means of guide devices.
  • the embodiments of the claims 13 and 14, which are configured parallel receiving receptacles for receiving two bag filters it is provided that in two receptacles each a receptacle or the bag filter stored therein are subjected to internal pressure, whereas at the other receptacle an internal pressure-free replacement of the bag filter is possible. Due to the parallel operation of several receptacles continuous operation of the entire device is possible without incurring stoppages caused by setup times or the blowing device would have to be switched off to replace the bag filter.
  • the adjusting devices for diverting the air flow to one or other receptacle can additionally be supplemented by valves, which are connected upstream of a coupling for fixing the bag filter to the blowing device.
  • valves which are connected upstream of a coupling for fixing the bag filter to the blowing device.
  • Both for moistening and for cleaning the bag filter is preferably used as cleaning liquid water.
  • the water can be heated to a working temperature and optionally mixed with cleaning agents.
  • the entire device is preferably housed in a mobile transport container with standardized dimensions, in which the device, including the necessary control and regulation technology is housed (protection claim 16).
  • a transport container is provided to the outside with standardized connections for electrical energy, the supply of industrial water and the discharge of sewage.
  • an optionally required pressure generator for pressurizing the cleaning fluids may be integrated into the transport container.
  • Such a transport container can be completely encapsulated by a forced ventilation to the outside, so that environmentally harmful substances are led out exclusively via the washing cycle from the transport container. An additional environmental impact through the cleaning process therefore does not take place. This can also contribute to the entrance of the transport container downstream personnel lock and / or material lock.
  • FIG. 1 shows a transport container 1, in which a device 2 for cleaning bag filters 3, 4 is added.
  • the transport container 1 is preferably a standard container or general purpose container with doors 5 on one end face. Behind the doors 5 of the transport container 1 is a lock chamber 6, through which the working space 7 is separated from the environment. By a personnel lock 8 and a material lock 9 in a lock wall 10 of the working space 7 is accessible or loadable.
  • the device 2 within the working space 7 comprises two receiving containers 11, 12 arranged parallel to one another, in which the bag filters 3, 4 are mounted horizontally.
  • Front side of the receptacle 11, 12, a blow box 13 is arranged, which is connected via a line section 14 with a motor-driven fan 15.
  • the fan 15 is preceded by a heating unit 16.
  • the assembly formed from the heating unit 16, the blower 15, the line section 14 and the blow box 13 is hereinafter referred to as blower 17. It is used for internal pressure of the bag filter 3, 4 with heated air.
  • the air is heated to a temperature above ambient air temperature, in particular to a temperature of about 40 ° C, preferably 40 ° - 70 ° C.
  • actuator 18 of the fan 15 outgoing air flow is the in the image plane upper receptacle 11 or in the drawn with a broken line position the other receptacle 12 can be fed.
  • supply lines 19, 20 are provided for the heated air, which are separately shut off via valve units 21, 22.
  • the entire blowing device 17 can be controlled via a control unit 24, which can be supplied with energy via connections provided on the outside of the transport container 1.
  • the connections 23 are standardized, so that the transport container 1 can be connected to the respective supply network at different places of use.
  • the entire transport container 1 is forced ventilated, wherein fresh air is supplied via an air supply 25 to the working space 7 and is discharged via a blower 26 again from the working space 7.
  • a stationary high-pressure cleaner 27 comprising a storage tank 28 with a burner 29 for heating the supplied via a terminal 30 operating water.
  • the burner 29 is fed from a fuel tank 31 with fuel.
  • a high-pressure pump 32 is connected, through which the preheated operating water is supplied via a hose of a manually operated cleaning lance 33.
  • To the storage tank 28 can be connected in a manner not shown further consumers such as a hand shower or a shower.
  • FIGS. 2 and 3 A variant of the device is in the FIGS. 2 and 3 shown. Unlike the device of FIG. 1 In this embodiment, the heating unit 34 is not connected in front of the blower 15, but incorporated in the line section 35 between the blower 15 and blow box 13. Otherwise, the configuration corresponds to the FIGS. 2 and 3 that of the device 2 of the FIG. 1 , wherein the same reference numerals are used for the same components. From the representation of FIG. 3 It is clear that the device 2 'is arranged in the horizontal elongated, wherein depending on the length of the bag filter to be cleaned 3, 4, the receptacle including the valve units 21 have a length of about 7 m and the entire assembly extends over more than 10 m in length and about 2 m in width. In this embodiment, each receptacle 11, 12 has a width of about 0.6 m.
  • the receptacle 11, 12 are jacked so that its upper edge 36 is at a height of about 90 cm. So that during the cleaning process, for example, in the receptacle 11, no interference from splashing or dirt of the other receptacle 12 occurs, 12 may be arranged between the receptacles 11, 12 additionally a not shown partition, which extends beyond the top edge 36 of the receptacle 12 addition. Here, for example, a height of 600 mm be sufficient to prevent the passage of water spray.
  • the bag filters 3, 3 'on trough-like configured supports 37 which are formed by extending in the direction of the longitudinal axis LA of the bag filters 3, 3' rods 38 ( FIG. 4 ).
  • the rods 38 are arranged at a generous distance parallel to one another, so that relatively large discharge openings 39 result between the rods 38. As a result, blockages of the support 37 are avoided.
  • the receptacle 11 shown in section is configured in the shape of a channel with two side walls 40, 41 which run parallel to one another and are connected to one another at their lower ends by a bottom 42.
  • the receptacle 11 delimits a U-shaped interior, in the middle region of which the bag filters 3, 3 'are held on supports 37 placed in the transition region to the lower third of the receptacle 11. Below the supports 37, the cleaning liquid including the removed impurities is collected on the bottom 42 and fed via a non-illustrated discharge of disposal outside the transport container 1.
  • the cleaning carriage 44 has on each of the rails 43 facing the longitudinal side two rollers 45 and a cross member 46 which extends in the central region between the rollers 45 bearing bearing plates 47.
  • the cross member 46 is hollow inside and connected to a supply line 48 for supplying cleaning fluid.
  • the cleaning liquid in this case occurs via the supply line 48 in the transverse member 46, to which in turn on the side facing away from the supply line 48 cleaning nozzles 49 are connected.
  • each a bag filter 3, 3 ' are each provided three cleaning nozzles 49.
  • the cleaning nozzles 49 are arranged such that by the exiting cleaning jets 50 each about 1/4 to 1/3 of the outer surface 51 of each bag filter 3, 3 'can be processed by manual or automatic movement of the cleaning slide 44 in the longitudinal direction.
  • the respective outer cleaning nozzles 49 are arranged at an angle to one another, so that their cleaning jets 50 intersect with the cleaning jet 50 of the central cleaning nozzle 49.
  • the cleaning nozzles 49 are not directed at right angles to the longitudinal axis LA on the bag filters 3, 3 ', but that the cleaning jets 50, as illustrated by the dotted line L, with the longitudinal axis LA include an angle ⁇ .
  • the angle is about 30 ° in this embodiment.
  • FIG. 6 It can be seen that the supply line 48 has a shut-off valve 52 to which a flexible hose section 53 is connected.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Claims (16)

  1. Dispositif pour nettoyer des filtres à manche, comportant au moins un réceptacle de logement (11, 12) pour l'orientation en position d'au moins un filtre à manche (3, 3', 4) alimenté dans son ensemble en pression interne par un dispositif de soufflage (17), ainsi qu'un agencement (44, 49) pour le nettoyage extérieur par voie humide du filtre à manche (3, 3', 4) alimenté en pression interne.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'air soufflé par le dispositif de soufflage (17) dans le filtre à manche (3, 3', 4) est chauffé à une température supérieure à la température de l'air ambiant.
  3. Dispositif selon la revendication 2, caractérisé en ce que l'air présente une température de 20°C à 70°C.
  4. Dispositif selon la revendication 1, caractérisé en ce que chaque manche de filtre (3, 3', 4) dans le réceptacle de logement (11, 12) est montée horizontalement sur un support (37) pourvu d'ouvertures de sortie (39).
  5. Dispositif selon la revendication 4, caractérisé en ce que le support (37) est formé par des barreaux (38) s'étendant en direction longitudinale de la manche de filtre (3, 3', 4).
  6. Dispositif selon la revendication 4 ou 5, caractérisé en ce que le support (37) est configuré avec une section transversale en forme de creux.
  7. Dispositif selon l'une des revendications 2 à 6, caractérisé en ce que l'agencement pour le nettoyage par voie humide (44, 49) présente au moins une buse de nettoyage (49) agencée mobile par rapport au filtre à manche (3, 3', 4) et dirigée vers sa surface extérieure (51), un jet de nettoyage (50) sortant de la buse de nettoyage (49) étant dirigé vers la surface extérieure (51) sous un angle (α) différent de 90° par rapport à l'axe longitudinal (LA) du filtre à manche (3, 3', 4).
  8. Dispositif selon la revendication 7, caractérisé en ce que la buse de nettoyage (49) est agencée sur un chariot de nettoyage (44) mobile en direction longitudinale du filtre à manche (3, 3', 4).
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que les buses de nettoyage (49) sont agencées de manière répartie sur la périphérie du filtre à manche (3, 3', 4).
  10. Dispositif selon la revendication 9, caractérisé en ce que les buses de nettoyage sont agencées de manière circulaire autour d'un filtre à manche (3, 3', 4).
  11. Dispositif selon l'une des revendications 8 à 10, caractérisé en ce que des rails de circulation (43) sont prévus sur des parois latérales (40,41) du réceptacle de logement (11), sur lesquels est guidé le chariot de nettoyage (44).
  12. Dispositif selon l'une des revendications 1 à 11, caractérisé en ce qu'au dispositif de soufflage (17) peuvent venir se raccorder simultanément au moins deux filtres à manche (3, 3', 4), les filtres à manche individuels (3, 3', 4) pouvant être alimentés de façon ciblée en pression interne au moyen de dispositifs de réglage (18, 21, 22).
  13. Dispositif selon la revendication 12, caractérisé en ce que plusieurs réceptacles de logement (11, 12) sont agencés parallèlement les uns aux autres.
  14. Dispositif selon l'une des revendications 1 à 13, caractérisé en ce que chaque réceptacle de logement (11, 12) est configuré pour loger deux filtres à manche (3, 3', 4).
  15. Dispositif selon l'une des revendications 1 à 14, caractérisé en ce qu'il est prévue un système d'arrosage pour humecter du côté extérieur les filtres à manche (3, 3', 4) alimentés en pression interne.
  16. Conteneur de transport comportant un dispositif selon l'une des revendications 1 à 15.
EP03014376A 2002-07-31 2003-06-26 Dispositif pour nettoyer des filtres à manche et un conteneur avec ce dispositif Expired - Lifetime EP1386652B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20211827U 2002-07-31
DE20211827U DE20211827U1 (de) 2002-07-31 2002-07-31 Vorrichtung zur Reinigung von Schlauchfiltern und Transportcontainer für diese Vorrichtung

Publications (2)

Publication Number Publication Date
EP1386652A1 EP1386652A1 (fr) 2004-02-04
EP1386652B1 true EP1386652B1 (fr) 2008-08-27

Family

ID=7973708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03014376A Expired - Lifetime EP1386652B1 (fr) 2002-07-31 2003-06-26 Dispositif pour nettoyer des filtres à manche et un conteneur avec ce dispositif

Country Status (3)

Country Link
EP (1) EP1386652B1 (fr)
AT (1) ATE406203T1 (fr)
DE (2) DE20211827U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020105750A1 (de) 2020-03-04 2021-09-09 Mann+Hummel Gmbh Filtervorrichtung, Luftführungsschlauch mit Filterelement, Tunnel und Verwendung der Filtervorrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0552454A3 (en) * 1992-01-07 1993-09-08 Buehler Ag Apparatus for cleaning the filtering elements of a filter
DE4443632A1 (de) * 1994-12-08 1996-06-13 Intensiv Filter Gmbh Staubfilter
GB2304600B (en) * 1995-09-05 2000-01-12 Patrick Joseph Butler A method and apparatus for cleaning a filter
WO2001068220A1 (fr) * 2000-03-15 2001-09-20 Mott Metallurgical Corporation Systeme a filtre et son procede de fonctionnement
DE10027320A1 (de) * 2000-06-05 2001-12-06 Wurz Oekopro Gmbh Dr Abreinigungssystem für Gewebefilterschläuche

Also Published As

Publication number Publication date
ATE406203T1 (de) 2008-09-15
DE50310401D1 (de) 2008-10-09
EP1386652A1 (fr) 2004-02-04
DE20211827U1 (de) 2002-10-02

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